ETYM Old Eng., haughty, difficult, dangerous, from Old Fren. dangereus, French dangereux. Related to Danger.
1. Causing fear or anxiety by threatening great harm; SYN. grave, grievous, serious, severe.
2. Involving or causing danger or risk; liable to hurt or harm; SYN. unsafe.
breakneck · chanceful · chancy · critical · desperate · dicey · dodgy · grave · grievous · harmful · hazardous · insecure · insidious · life-threatening · mordacious · on the hook · parlous · perilous · precarious · risky · self-destructive · serious · severe · suicidal · touch-and-go · treacherous · unreliable · unsafe · vulnerable · wild